Finished in November 2009, accepted as public discussion paper by the OGC; available at the OGC web page:
Reference implementation scheduled for August 2010.
Complementing the WVS specification scheduled for September 2010.
Removing all the styling aspects from the WVS specification and moving them to an an SLD profile for WVS. Changes resulting from discussions within the OGC 3DIM working group and and with industry.
When to reach an open standard for image-based 3D portrayal depends on discussions and acceptance.